My ex knows that I am seeing new people. He drove past a cafe he knew I would be at the other night and saw me with a guy I wanted to meet. A few days later we saw each other and he asked me about the guy. I told him he was only someone I wanted to meet and so far there's been nothing more. Then he asked me if and when we had sex would I mind if he came to watch the guy fuck me. He said he thinks he'd enjoy this. WTF? (I was stumped to be honest. Then I thought about it. The guy is very well endowed. My ex is below average. He's be shocked to see this guy and even more shocked if he watched because he was always mediocre in bed!) What would you say if an ex asked you something like this?